CAUTION SAFETY PRECAUTIONS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY a. Do not operate or allow the oven to be operated with the door open. b. Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary;...
FOREWORD Read this Manual carefully. Failure to adhere to or observe the information in this Manual may result in exposing yourself to the Microwave Energy normally contained within the oven cavity. TABLE OF CONTENTS (Page) SAFETY PRECAUTIONS ...................... inside front page SPECIFICATIONS ............................
SPECIFICATIONS Rated Power Consumption ........1,350W maximum (Microwave oven+Cook top lamps+Ventilation fan) Microwave Output ...........950W (IEC 705 TEST PROCEDURE) Frequency ...............2,450 MHz ± 50 MHz Power Supply ............120 VAC, 60 Hz Rated Current............12.5 Amp. (Microwave oven+Cook top lamps+Ventilation fan) Magnetron Cooling ..........Forced Air Cooling Rectification.............Rectification Voltage Doubler Half-Wave Door Sealing............Choke System Safety Devices ............Magnetron Thermostat:...
CAUTIONS Unlike other appliances, the microwave oven is MICROWAVE RADIATION high-voltage and high-current equipment. Personnel should not be exposed to the Though it is free from danger in ordinary use, microwave energy which may radiate from the extreme care should be taken during repair. magnetron or other microwave generating device if it is improperly used or connection.
INSTALLATIONS BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY. PRECAUTIONS ON INSTALLATION A. Plug the power supply cord into a 120V AC, 60Hz, single-phase power source with a capacity of 20A. B. Avoid placing the unit in a location where there is direct heat or splashing water.
CONTROL PANEL INSTRUCTIONS 1. DISPLAY: The display includes a clock and 11. FRESH VEGETABLE: Touch this pad to cook indicators to tell you time of day, cooking time from 1 to 4 cups. settings, and cooking functions selected. 12. NUMBER: Touch number pads to enter cooking 2.
GENERAL INFORMATION FOR SERVICE FEATURES AND SPECIFICATIONS GENERAL PRECAUTIONS IN USE FEATURES A. Never operate the unit when it is empty. Operating the oven with no load may shorten the life of the A. The safety systems incorporated in this model are: magnetron.
SERVICE INFORMATION PRECAUTIONS AND REPAIR SERVICE TIPS PRELIMINARY (3) Do not operate the unit until it is completely A. SINCE NEARLY 2,100 VOLTS EXISTS IN SOME repaired, if any of the following conditions exist. CIRCUITS OF THIS UNIT REPAIRS SHOULD BE The unit must not be operated.
MICROWAVE LEAKAGE TEST MEASURING MICROWAVE ENERGY CAUTIONS LEAKAGE • Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to • Pour 275±15cc of 20±5°C(68±9°F) water in a beaker servicing. which is graduated to 600 cc, and place the beaker •...
MEASUREMENT WITH THE OUTER CASE NOTE WHEN MEASURING REMOVED (1) Do not exceed meter full scale deflection. (2) The test probe must be removed no faster than (1) When you replace the magnetron, measure for 1 inch/sec (2.5cm/sec) along the shaded area, microwave energy leakage before the outer case otherwise a false reading may result.
DISASSEMBLY INSTRUCTIONS IMPORTANT NOTES: UNIT MUST BE DISCONNECTED FROM ELEC- TRICAL OUTLET WHEN MAKING REPAIRS, RE- PLACEMENTS, ADJUSTMENTS AND CONTIN- UITY CHECKS. WAIT AT LEAST ONE MINUTE, UNTIL THE HIGH VOLTAGE CAPACITOR IN THE HIGH VOLTAGE POWER SUPPLY HAS FULLY DISCHARGED.
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HOW TO INSERT THE F.P.C. CONNECTOR HOW TO REMOVE THE F.P.C. CONNECTOR Follow the steps below as illustrated in Figures 6 Follow the steps below as illustrated in Figures 4 and 7 to insert the F.P.C. connector. and 5 to remove the F.P.C. connector. (1) Insert the F.P.C.
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B. REMOVING THE OUT CASE(Figure 8) (1) Remove the vent grille by removing two screws (5) Remove four screws securing them to the back securing it to the front of out case. plate. (2) Remove four screws securing it to the air duct. (6) Slap the both side of out case backward by 1~2 (On the top plate of out case) inches.
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C REMOVING THE DOOR INTERLOCK SWITCHES (Figures 9,10) (1) Disconnect the wire leads from the interlock switches. (2) Remove two screws securing the Latch Board. (3) Make necessary replacements and check microwave energy leakage according to “ADJUSTMENT PROCEDURE” on page 7-11, 12. Secondary Interlock Switch Latch Board...
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D. REMOVING MAGNETRON NOTES: • When removing the magnetron, make sure that its (Figures 11 Through 12) dome does not hit any adjacent parts, or it may be (1) Disconnect the power supply cord from the wall damaged. outlet. (2) Remove the vent grille and the out case from unit. •...
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E. REMOVING DOOR (Figure 13) G. ASSEMBLING DOOR (1) Remove the vent grille by removing two screws (1) When mounting the door assembly to the oven securing it to the front of the out case. assembly, be sure to adjust the door assembly parallel (2) Remove the door cap with small screw driver.
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I. REMOVING THE TURNTABLE MOTOR (1) Remove the turntable. (2) Remove the rotating ring on the bottom plate of oven cavity. (3) Remove the base plate by removing 5 screws securing it to the oven cavity. (Figure 17) (4) Disconnect the leadwire from the turntable motor terminals.
INTERLOCK SYSTEM INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting from the microwave leakage. ADJUSTMENT PROCEDURES CHECK THE DOOR LATCH AND SWITCH To avoid possible exposure to microwave energy CLOSING.
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TEST THE LATCH AND SWITCH SEQUENCE (5) Open the oven door slowly. Watch the door latch, (7) When you achieve the proper sequence of the Secondary Switch. Release Rod and Lever switches in Steps 5 and 6, tighten the latch board on the switches to make sure they are zero to the screws at that point.
INTERLOCK CONTINUITY TEST A. PRIMARY INTERLOCK SWITCH TEST B. SECONDARY INTERLOCK SWITCH TEST Disconnect the wire lead from the secondary When the door is opened slowly, an audible click switch. should be heard at the same time or successively Connect the ohmmeter leads to the common at intervals and the latches should activate the (COM) and normally open (NO) terminals of the switches with an audible click.
TEST AND CHECKOUT PROCEDURES, AND TROUBLE SHOOTING - CAUTIONS - - DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER Filament REMOVINGING THE CABINET FROM THE UNIT. Winding PROCEED WITH THE TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR Secondary AND REMOVING THE WIRE LEADS FROM THE Winding...
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COMPONENTS TEST PROCEDURES RESULTS Measure the resistance: Normal reading: (1) Terminal to terminal Momentarily indicates several ohms, and then gradually returns to infinite ohms. Abnormal reading: Ohm- Indicates continuity or infinite ohms meter from the beginning. HIGH-VOLTAGE Figure 22 CAPACITOR (2) Terminal to case Normal readings: Infinite.
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COMPONENTS TEST PROCEDURES RESULTS CIRCUIT BOARD See page 7-19 for “CHECKOUT PROCEDURES FOR THE CIRCUIT BOARD” Measure the resistance between terminal When When not pins of connector KEY CON. Resistance touched touched NOTE: value Less than More than When reconnecting the FPC connector, 400 ohms 1 mega ohm make sure that the holes on the FPC connector are properly engaged with hooks...
COMPONENTS TEST PROCEDURES RESULTS POWER Check for continuity of relay 2 with an LEVEL ohm-meter. (Remove wire leads from relay 2 and 4 sec 18 sec operate the unit.) 6 sec 16 sec 8 sec 14 sec Relay 2 10 sec 12 sec RELAY2 12 sec...
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(2) CHECKOUT PROCEDURES FOR RELAY. - PROBLEM (A) - FAN motor and oven lamp turn on without touching START key when the door is closed. Remove the mate connector of I/O GOOD CON from the circuit board. Does the unit still operate? Replace the circuit board - PROBLEM (B) -...
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(3) CHECKOUT PROCEDURES FOR CIRCUIT BOARD The following symptoms indicate a defective circuit 6) Wrong figures appear. board. 7) The figures of all digits. 1) The start function fails to operate but the high 8) Some of the indicators do no flicker light up. voltage Systems, the interlock switches, the door 9) The clock does not keep time properly.
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